Strict mode only reserved words in AssignmentExpressions do not cause parse errors

[conrad-watt]

What steps will reproduce the problem?
Compare Esprima's behaviour when parsing the following two programs. Thanks to @edgemaster for the examples.

"use strict";
var public = 1;

"use strict";
public = 1;

What is the expected output?
A parse failure for both programs.

What do you see instead?
The first program results in a parse failure. The second program is parsed as though 'public' were not a ReservedWord in strict mode. Note that this behaviour does not occur if a non-strict mode only reserved word such as enum is substituted.

What version of the product are you using? On what operating system? Which browser?
Master. This bug can be seen on the online parser demo.